US3371709A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Falling film plate heat exchanger
Assignee: Rosenblad Corp
•
Filing: 1965-06-15
•
Granted: 1968-03-05
•
Expires: 1985-06-15
Abstract
No abstract record available.
Inventors
- 👤 Rosenblad Curt Fredrik
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:09
CPC Classifications
F; F28; F28D; F28D5/00; F28D5/02; F28D9/00; F28D9/0031; Y; Y10; Y10S; Y10S165/00; Y10S165/163; Y10S165/177; Y10S165/178
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1481723A
Cited
US2285225A
Cited
US2343886A
Cited
US2536840A
Cited
US2634958A
Cited
US3282334A
Cited
US3229763A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-03-05 | 1971-09-04 | 1972-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-03-05 | 1975-09-04 | 1976-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-03-05 | 1979-09-04 | 1980-03-05 | $7700.00 | Window Closed / Lapsed |